How Do You Correctly Plot a Bode Diagram for a High-Pass Filter in MATLAB?

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SUMMARY

The discussion centers on plotting a Bode diagram for a high-pass filter (HPF) using MATLAB. The transfer function provided is G(s) = RCs / (RCs + 1), where R is 10 kΩ and C is 220 nF. The user encountered issues with incorrect magnitude and phase shift outputs. The correct MATLAB code to generate the Bode plot is: s=tf('s'); RC=220e-12*1e4; G=RC*s/(RC*s+1); bode(G).

PREREQUISITES
  • Understanding of transfer functions in control systems.
  • Familiarity with MATLAB's Control System Toolbox.
  • Basic knowledge of high-pass filter design.
  • Experience with Bode plot interpretation.
NEXT STEPS
  • Learn how to manipulate transfer functions in MATLAB using the Control System Toolbox.
  • Explore the effects of component values on Bode plots for high-pass filters.
  • Study the differences between Bode plots for various filter types.
  • Investigate MATLAB functions for analyzing frequency response.
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Electrical engineers, control system designers, and students learning about filter design and frequency response analysis in MATLAB.

gimini75
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Hi

I have a transfer function< I want to draw a bode diagram in MATLAB, the transfer function is for a simple HPF when I use MATLAB to find the magnitude and phase shift it giving a wrong diagram, the transfer function is:

=RCs / (RCs + 1)
I want to know how shoud I have to manipulate this function in MATLAB to find the correct answer?
Capacitance = 220 nF
R = 10 kilo ohm
Thanks
 
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s=tf('s');
RC=220e-12*1e4;
G=RC*s/(RC*s+1);
bode(G)
 

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